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Belligerents increasingly rely on media manipulation, propaganda, and communication to attain strategic advantages in conflict. Given the civilian propagandists’ clear role in creating tactical or strategic advantages for one side in the conflict, should these propagandists be considered combatants, and can they therefore be legitimately targeted because of their activities? This article overcomes traditional binary frameworks of distinction to argue that propagandists are indirectly participating civilians, i.e. participants who cannot be intentionally or directly killed in conflict. Because of their activities, propagandists, it argues, are liable to less-than-lethal harm, of which it identifies three types (destruction of property, privation of liberty, isolation). The article then proposes a necessary criterion – necessity – to decide if less-than-lethal harm is warranted against propagandists. It then creates four new criteria – denial of agency, falsehood, influence, gratification – to serve as assessment criteria able to decide what degree of harm a propagandist may maximally face. In making this argument, the article contributes to just war literature by proposing a novel way to evaluate the ethical status of a highly diverse, yet undoubtedly influential, category of war participants: those who undertake the ‘media battle’, outside of the military.
The interaction between ingested turbulence and rotating blades is a key source of broadband noise in engineering applications. In this paper, a far-field noise model accounting for source correlation across the span of the blade and between blades is developed and applied to the study of homogeneous isotropic turbulence ingestion by a model cooling fan, wind turbine and aircraft propeller. The widely used theory of Amiet is revisited and it is shown that previous works produce conflicting results when attempting to account for blade-to-blade correlation. Central to the model is the calculation of the time between blade chops of the same turbulent eddy as heard by the observer. In this paper it is shown that, when derived correctly, Amiet's theory accounts for correlated sources between blades and, thus, can predict haystacking tones. Comparisons with the new rotational formulation and with experimental data enable us to show that Amiet's theory can be used to accurately predict turbulence ingestion noise from open rotors. In particular, it is found that the infinite-span assumption in strip theory and the neglect of correlation effects across the span do not undermine the accuracy of this theory. This is of great importance because, unlike Amiet's theory, models which treat rotational effects and source correlation exactly are expensive to evaluate routinely at high frequencies due to the slow convergence of infinite series with Bessel functions.
For $-1\leq B \lt A\leq 1$, let $\mathcal{C}(A,B)$ denote the class of normalized Janowski convex functions defined in the unit disk $\mathbb{D}:=\{z\in\mathbb{C}:|z| \lt 1\}$ that satisfy the subordination relation $1+zf''(z)/f'(z)\prec (1+Az)/(1+Bz)$. In the present article, we determine the sharp estimate of the Schwarzian norm for functions in the class $\mathcal{C}(A,B)$. The Dieudonné’s lemma which gives the exact region of variability for derivatives at a point of bounded functions, plays the key role in this study, and we also use this lemma to construct the extremal functions for the sharpness by a new method.
Let $f: M\rightarrow M$ be a $C^{1+\alpha }$ diffeomorphism on an $m_0$-dimensional compact smooth Riemannian manifold M and $\mu $ a hyperbolic ergodic f-invariant probability measure. This paper obtains an upper bound for the stable (unstable) pointwise dimension of $\mu $, which is given by the unique solution of an equation involving the sub-additive measure-theoretic pressure. If $\mu $ is a Sinai–Ruelle–Bowen (SRB) measure, then the Kaplan–Yorke conjecture is true under some additional conditions and the Lyapunov dimension of $\mu $ can be approximated gradually by the Hausdorff dimension of a sequence of hyperbolic sets $\{\Lambda _n\}_{n\geq 1}$. The limit behaviour of the Carathéodory singular dimension of $\Lambda _n$ on the unstable manifold with respect to the super-additive singular valued potential is also studied.
Enduring ethnic inequalities exist in mental healthcare. The COVID-19 pandemic has widened these.
Aims
To explore stakeholder perspectives on how the COVID-19 pandemic has increased ethnic inequalities in mental healthcare.
Method
A qualitative interview study of four areas in England with 34 patients, 15 carers and 39 mental health professionals from National Health Service (NHS) and community organisations (July 2021 to July 2022). Framework analysis was used to develop a logic model of inter-relationships between pre-pandemic barriers and COVID-19 impacts.
Results
Impacts were largely similar across sites, with some small variations (e.g. positive service impacts of higher ethnic diversity in area 2). Pre-pandemic barriers at individual level included mistrust and thus avoidance of services and at a service level included the dominance of a monocultural model, leading to poor communication, disengagement and alienation. During the pandemic remote service delivery, closure of community organisations and media scapegoating exacerbated existing barriers by worsening alienation and communication barriers, fuelling prejudice and division, and increasing mistrust in services. Some minority ethnic patients reported positive developments, experiencing empowerment through self-determination and creative activities.
Conclusions
During the COVID-19 pandemic some patients showed resilience and developed adaptations that could be nurtured by services. However, there has been a reduction in the availability of group-specific NHS and third-sector services in the community, exacerbating pre-existing barriers. As these developments are likely to have long-term consequences for minority ethnic groups’ engagement with mental healthcare, they need to be addressed as a priority by the NHS and its partners.
Pharmacies have a particularly important responsibility to supply medicine to disaster victims in order to save lives. This study investigated the characteristics of pharmacies that are well prepared for disasters as well as the efforts of the prefectural pharmaceutical association (PPA) to which the pharmacies belong.
Methods:
Questionnaires on matters related to disaster preparedness were mailed to 50 randomly selected pharmacies in each of Japan’s 47 prefectures as well as all 47 PPAs in Japan. Logistic regression analysis was performed to examine the association of pharmacy background and the activities of the PPA to which they belong with pharmacy disaster preparedness as well as the association with pharmacies’ awareness of disaster preparedness.
Results:
Pharmacies in prefectures that conducted disaster preparedness training at least three times a year were better prepared for disasters. In addition, pharmacies with high online utilization and high disaster-preparedness awareness were significantly more prepared for disasters.
Conclusions:
Pharmacies that can promptly provide medicine to disaster victims are considered to be well-prepared for disasters. The results suggest that pharmacy preparedness is also influenced by the disaster preparedness activities of their prefectures.
Cross-flow transition over a delta wing is systematically studied in a Mach 6.5 hypersonic wind tunnel, employing the Rayleigh scattering flow visualisation, high-speed schlieren and fast-response pressure sensors. Direct numerical simulations and analysis based on linear stability theory under the same flow conditions are applied to analyse the transition mechanism. Three unstable modes are identified: the travelling cross-flow instabilities, the second mode and the low-frequency waves. It is shown that the travelling cross-flow vortices first appear in the cross-flow region near the leading edge of the model. These vortices can modulate the mean profile of the flow, which benefits the growth of second mode. A phase-locked interaction mechanism transfers energy from the cross-flow instabilities to the high-frequency second mode, leading to amplification at the expense of the cross-flow instability. As the second mode grows to a critical amplitude, it triggers a $z$-type secondary instability within a similar frequency range, which introduces secondary finger-like structures connecting to the cross-flow vortex. It is further found that the generation of these finger-like structures is related to the expansion and compression of the second mode. These finger vortices further evolve along the streamwise direction into low-frequency waves and corresponding hairpin-like structures that finally trigger turbulence. An interaction mechanism likely exists between the secondary instability and the low-frequency waves, since their phase speeds are approaching each other. These observations of the interaction mechanism are consistent with those of previous studies on hypersonic boundary layers (Zhang et al., Phys. Fluids, vol. 32 (7), 2020, 071702; Li et al., Phys. Fluids, vol. 32 (5), 2020, 051701).
The rocky intertidal zone of sheltered shores in Breiðafjörður, north-west Iceland is dominated by monospecific stands of canopy-forming brown algae Ascophyllum nodosum, which provide habitat for mobile organisms and has been subjected to long-standing rotational harvesting. We investigated the assemblage composition of little-studied mobile brachyuran crabs in this area, to track distributional shifts in a native species responding to climate change and extent of occupancy of the intertidal by a primarily subtidal invasive non-native species. Potential interactive effects of seaweed harvesting were explored. Breiðafjörður was compared with two reference sites in Faxaflói, south-west Iceland. The study revealed clear poleward expansion of the native European green crab Carcinus maenas in the region, displacing the native spider crab Hyas araneus particularly at mid-shore levels. The invasive non-native Atlantic rock crab Cancer irroratus had negligible occupancy in the intertidal zone, indicating limited effects on the intertidal crab assemblage, composition, and abundance. The current harvesting regime of A. nodosum in Breiðafjörður did not affect the composition and abundance of the brachyuran crab assemblage in the rocky intertidal zone. H. araneus is likely being squeezed by displacement subtidally by C. irroratus, and intertidally by C. maenas. Overall, we provide insights into the potential interactions between climate change, invasive species, and human activities in the rocky intertidal zone.
In this article, Steven Medema provides some reflections on his tenure as editor of the Journal of the History of Economic Thought (1999 – 2008). This was a time of significant transition in the life of the journal, and the successful navigation of this period provides an excellent illustration of how much an editor and a journal rely on the assistance and support of both key individuals and the broader community of scholars in the field.
The aerodynamic performance of a wing model with a row of distributed engines are investigated at the vertical take-off condition. The engines are installed near the trailing edge of the wing. During vertical take-off, the jets exit from the engines and impinge perpendicularly to the ground, providing a thrust for the aircraft. Due to the ground effects, complex vortex structures are induced by the jets. The vortices are categorised into the spanwise vortices and the chordwise vortices. The underwing vortices can lead to low-pressure regions on the lower surface of the wing, resulting in an undesirable downward force. The underwing vortex structures are affected by the ratio of the engine distance to the engine diameter ($S/D$). At a small $S/D$ = 1.10, the flow field is dominated by the spanwise vortices; at a large $S/D$ = 2.78, the flow field is dominated by the chordwise vortices. The range and strength of the spanwise vortices are affected by the vortices interaction. Competition mechanism exists between the range and strength effects, which results in the non-linear variation of the wing lift coefficient with engine spacing. The details of the flow physics underneath the wing and its mechanism on the lift of the wing during take-off are investigated.
The main cause of mortality in great apes in zoological settings is cardiovascular disease (CVD), affecting all four taxa: chimpanzee (Pan troglodytes), bonobo (Pan paniscus), gorilla (Gorilla spp.) and orangutan (Pongo spp.). Myocardial fibrosis, the most typical histological characterisation of CVD in great apes, is non-specific, making it challenging to understand the aetiopathogenesis. A multifactorial origin of disease is assumed whereby many potential causative factors are directly or indirectly related to the diet, which in wild-living great apes mainly consists of high-fibre, low-carbohydrate and very low-sodium components. Diets of great apes housed in zoological settings are often different compared with the situation in the wild. Moreover, low circulating vitamin D levels have recently been recognised in great apes housed in more northern regions. Evaluation of current supplementation guidelines shows that, despite implementation of different dietary strategies, animals stay vitamin D insufficient. Therefore, recent hypotheses designate vitamin D deficiency as a potential underlying factor in the pathogenesis of myocardial fibrosis. The aim of this literature review is to: (i) examine important differences in nutritional factors between zoological and wild great ape populations; (ii) explain the potential detrimental effects of the highlighted dietary discrepancies on cardiovascular function in great apes; and (iii) elucidate specific nutrition-related pathophysiological mechanisms that may underlie the development of myocardial fibrosis. This information may contribute to understanding the aetiopathogenesis of myocardial fibrosis in great apes and pave the way for future clinical studies and a more preventive approach to great ape CVD management.
This article analyses how wealthy men and women manipulated citizenship regimes during and after the Habsburg Empire to access the family laws most convenient for their private lives. To do this, I compare migratory divorce practices in pre-1918 Habsburg Hungary and the post-1918 Free State of Fiume. This article shows that while before 1918 it was mercenary actors who utilised legal loopholes between Austrian and Hungarian family laws and citizenship regulations to obtain divorces for the rich, after 1918 it was the impoverished, globally-isolated, mercenary postimperial state that procured the means for rich clients to buy their way out of their own state's family laws, raising questions about the relationship between the early twentieth-century postimperial world of globally dependent European successor states with today's postcolonial ‘golden passport’ system.
We propose a flexible lattice model to evaluate the fair value of insurance contracts embedding both financial and actuarial risk factors. Flexibility relies on the ability of the model to manage different specifications of the correlated processes governing interest rate, mortality, and fund dynamics, thus allowing the insurer to make the most appropriate choices. The model is also able to handle additional guarantees like a surrender opportunity for which explicit formulae are not available being it similar to an American derivative. The model discretizes mortality and interest rate dynamics through two different binomial lattices and then combines them into a bivariate tree characterized by the presence of four branches for each node. The probability of each branch is defined to replicate the correlation affecting the two processes. The bivariate model is useful to compute the value of survival zero coupon bond. When adding another source of risk, such as the fund dynamics for evaluating fund-linked insurance products, we model it through a bivariate tree that captures the influence of the interest rate on its drift term. Then, the mortality risk is embedded by defining a trivariate tree presenting eight branches emanating from each node with probabilities defined in order to capture the correlations of the processes. Extensive numerical experiments assess the model accuracy by considering some stylized policies, but the model application is not limited to them being it able to manage different contract specifications.
An understanding of emergency nurses’ roles, challenges, and preparedness in the context of armed conflict is necessary to capture in-depth insights into this specialty and their preparational needs when working in these unique environments. Unfortunately, the evidence about emergency nurses’ work in the context of armed conflict is scant.
Method:
Semi-structured interviews were conducted with 23 participants and analyzed using qualitative content analysis. The COREQ guideline for reporting qualitative research was followed.
Results:
The emergency nurses’ roles, challenges, and preparedness in hospitals in the context of armed conflict were explored in detail. The main challenges that these nurses faced included poor orientation, access block, and communication barriers. Various perspectives about preparation, including education, training, and strategies for preparing emergency nurses were identified. The most striking findings in these settings were the diversity of armed conflict injuries, clinical profiles of patients, triage of mass casualties, trauma care, surge capacity, orientation, communication, and strategies for preparing nurses.
Conclusions:
This study provided an exploration of the scope of emergency nurses’ roles, and how they were prepared and expected to function across multiple hospitals in armed conflict areas. The resultant snapshot of their experiences, challenges, and responsibilities provides an informative resource and outlines essential information for future emergency nursing workforce preparedness. There is a broad range of preparational courses being undertaken by emergency nurses to work effectively in settings of armed conflict; however, required education and training should be carefully planned according to their actual roles and responsibilities in these settings.